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“The term “eye-protecting desk lamp” is not scientifically accurate; Provincial Consumers Association: Over 80% of desk lamps have too high a color temperature, which can affect eye health

2017-05-17 View Original

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An ordinary table lamp that comes with the label “eye-friendly” seems to gain a premium status, resulting in its price doubling. Yesterday, the comparison test report on \"reading and writing lamps\" released by the Jiangsu Provincial Consumers Association was made public. The report shows that over 80% of these lamps have a color temperature that is too high, which may affect eye health. The consumer association explained that the term \"eye-protecting desk lamp\" is not scientific; people have misconceptions when choosing desk lamps. It is recommended to avoid the hazards of blue light when selecting such lamps and to pay attention to eye safety. Moreover, it’s not true that the more expensive a desk lamp is, the better it is. Out of 173 batches of desk lamps, only 3 batches met the standards. The Jiangsu Provincial Consumers Association commissioned the **Light Industry Electric Light Source Materials Quality Supervision and Testing Center to conduct comparative tests on desk lamps purchased through retail stores and online shopping platforms. The tests evaluated five technical parameters: the length of the power cord, light shielding capability, color temperature, general color rendering index, and photometric requirements.   The samples for this comparative test were purchased by staff from consumer protection organizations in their capacity as ordinary consumers from the market; a total of 173 batches were acquired, including 130 brand batches of LED desk lamps, 29 brand batches of fluorescent lamp-powered desks, and 14 brand batches of incandescent (including halogen-tungsten) lamp-powered desks. Recently, the Provincial Consumers Association released the results. It turned out that out of 173 batches of table lamps, only 3 batches met all five technical requirements. The color temperature measurements of these table lamps were not satisfactory; using 4000K as the reference standard, less than 20% of them, namely 30 batches, had a color temperature that did not exceed this standard. In other words, more than 80% of the table lamps had a color temperature that was too high.   **The person in charge of the Quality Supervision and Testing Center for Electrical Lighting Materials in the light industry explained that, under normal circumstances, a lighting source with a color temperature exceeding 6500K can cause damage to eyesight; in this comparison test, the color temperature of 21 batches of table lamps exceeded 6500K. The blind pursuit of high brightness and the notion that LED lights are superior are both misconceptions in product selection. When choosing desk lamps, people make some errors; for example, they confuse the \"product name\" with its \"functions.\" The term \"eye-protecting lamp\" is merely a colloquial expression – there are no specific standards established for desks lamps with eye-protecting capabilities. Moreover, the relationship between such eye-protecting features and the overall performance of the desk lamp has not been rigorously scientifically proven, nor are there any medical clinical evidences to support it. Currently, the term \"eye-protecting desk lamp\" used in the market has no scientific basis. Scientifically speaking, no matter what kind of lamp is used for reading or studying, it will not have a relaxing effect on the eyes.   Secondly, \"flicker-free\" products have higher moisture content. The biggest advantage of eye-protecting desk lamps on the market is their flicker-free feature. In fact, it is difficult for the human eye to detect its high-frequency flickering, but the flickering still exists; only the frequency during high-frequency operation is much higher than that during operation at the power frequency.   Once again, many consumers, when choosing table lamps, base their decision on brightness and clear visibility, seeking a \"particularly bright and clear\" lighting effect. In fact, this is a mistaken notion; under current technical conditions, while the illumination level of a lamp can be increased significantly, the intensity of harmful reflections also rises substantially. This can damage the cornea and iris of the eyes of those who use the lamp, as well as impair the function of the photoreceptor cells in the retina, thereby causing visual fatigue.   At the same time, many people believe that “LED lights” are environmentally friendly, have low power consumption, high luminous efficiency, a long lifespan, and are of higher quality. In response, Fu Zheng from the Complaints Department of the Provincial Consumers Association said that this is not the case. She explained that since most LED lights use white LEDs, the cool light tends to cause direct glare. If there is no light emission angle and no anti-glare measures such as grids or lenses are used, it not only causes glare but also reduces visual performance, which is detrimental to reading. Moreover, the uneven quality of LED lighting fixtures in the current market is a common problem; some low-quality table lamps use low-power LEDs as light sources, resulting in insufficient total power and thus an inadequate level of illumination. If used as a bedside lamp or night light, where the contrast requirement is not high, the impact is likely to be minimal. However, when used as a reading lamp, insufficient illumination can accelerate visual fatigue, which is not conducive to protecting eyesight. When choosing a desk lamp, the following points should be taken into account – first and foremost, it is necessary to check whether the product’s labeling is complete. Reading and writing desks lamps should indicate on their own bodies, as well as on their packaging and instructions, the type of light source required, the color rendering index, and the color temperature. Consumers can use this information to select a suitable product based on their own requirements. In particular, for LED reading and writing desks lamps, it is advisable to choose those with a color temperature of 4000K or lower and a color rendering index of 82 or higher. For users with high requirements, when choosing products with fluorescent light sources, it is also important to select those with a color temperature of no more than 4000K. When choosing a table lamp, consumers should check whether there are any markings; if not, they can ask the seller for information so as to purchase a suitable product.   Additionally, when making a choice, it is important to check for the 3C mark; this is a safety certification mark that represents a mandatory requirement aimed at ensuring the safe use of the product.   Secondly, to avoid strong glare, it is recommended that consumers choose lighting products with matte covers as much as possible. Once again, LED chips contain a high level of blue light, which can have a significant impact on the retina. **According to the standards, ordinary lighting LED products must ensure that the blue light hazard is at a harmless or low-hazard level. When choosing LED lighting products, especially for children, it is best to opt for those labeled as being non-hazardous. This information can be found on the product packaging, and consumers should pay attention to it when making purchases.   At the same time, staff from the provincial consumer association explained that there is a wide variety of reading and writing lamps available on the market, promoted in various ways, with prices ranging from dozens of yuan to over a thousand yuan. According to the test results, it’s not the case that the more expensive ones are necessarily the best fit for the requirements. When making a choice, consumers should select table lamps whose performance meets their requirements based on their own needs. They should opt for products from brands with a high reputation and good reviews, avoid products that lack proper labeling, keep proof of purchase, and seek to protect their legitimate rights and interests promptly in the event of quality issues.

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